More WIP, trying different approach (soft links rather than include .c's)

examples/hello/hello.ino

@@ -3,8 +3,13 @@
 PicoDVI dvi(320, 240, VREG_VOLTAGE_1_20, dvi_timing_640x480p_60hz, pimoroni_demo_hdmi_cfg);
 
 void setup() {
+  Serial.begin(115200);
+  while(!Serial);
+  Serial.println("A");
   dvi.begin();
+  Serial.println("B");
 }
 
 void loop() {
+  Serial.println("C");
 }

software/libdvi/dvi.h

@@ -52,6 +52,11 @@ struct dvi_inst {
 
 };
 
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
 // Set up data structures and hardware for DVI.
 void dvi_init(struct dvi_inst *inst, uint spinlock_tmds_queue, uint spinlock_colour_queue);
 
@@ -73,7 +78,7 @@ void dvi_scanbuf_main_16bpp(struct dvi_inst *inst);
 void dvi_framebuf_main_8bpp(struct dvi_inst *inst);
 void dvi_framebuf_main_16bpp(struct dvi_inst *inst);
 
-#ifdef __cplusplus
+#if defined(__cplusplus)
 }
 #endif
 

software/libdvi/dvi_timing.c

@@ -244,11 +244,7 @@ void __dvi_func(dvi_timing_state_advance)(const struct dvi_timing *t, struct dvi
 		    (s->v_state == DVI_STATE_BACK_PORCH && s->v_ctr == t->v_back_porch) ||
 		    (s->v_state == DVI_STATE_ACTIVE && s->v_ctr == t->v_active_lines)) {
 
-#if defined(ARDUINO)
-			s->v_state = (dvi_line_state)(((int)s->v_state + 1) % (int)DVI_STATE_COUNT);
-#else
 			s->v_state = (s->v_state + 1) % DVI_STATE_COUNT;
-#endif
 			s->v_ctr = 0;
 		}
 }

software/libdvi/tmds_encode.h

@@ -4,6 +4,11 @@
 #include "hardware/interp.h"
 #include "dvi_config_defs.h"
 
+#if defined(__cplusplus)
+extern "C"
+{
+#endif
+
 // Functions from tmds_encode.c
 void tmds_encode_data_channel_16bpp(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix, uint channel_msb, uint channel_lsb);
 void tmds_encode_data_channel_8bpp(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix, uint channel_msb, uint channel_lsb);
@@ -12,6 +17,10 @@ void tmds_setup_palette_symbols(const uint16_t *palette, uint32_t *symbuf, size_
 void tmds_setup_palette24_symbols(const uint32_t *palette, uint32_t *symbuf, size_t n_palette);
 void tmds_encode_palette_data(const uint32_t *pixbuf, const uint32_t *tmds_palette, uint32_t *symbuf, size_t n_pix, uint32_t palette_bits);
 
+#if defined(__cplusplus)
+}
+#endif
+
 // Functions from tmds_encode.S
 
 void tmds_encode_1bpp(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix);
@@ -51,6 +60,9 @@ void tmds_encode_sio_loop_peekpop_ratio8(const uint32_t *pixbuf, uint32_t *symbu
 void tmds_encode_sio_loop_peekpop_ratio16(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix);
 void tmds_encode_sio_loop_peekpop_ratio32(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix);
 void tmds_encode_sio_loop_peekpop_ratio64(const uint32_t *pixbuf, uint32_t *symbuf, size_t n_pix);
+
+#if defined(__cplusplus)
+}
 #endif
 
 #endif

src/PicoDVI.cpp

@@ -1,12 +1,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include "PicoDVI.h"
-
+#include "pico/multicore.h"
-#define PICO_COPY_TO_RAM 1
-#include "../software/libdvi/dvi.c"
-#undef __dvi_func // Avoid redefine warning
-#include "../software/libdvi/dvi_timing.c"
-#include "../software/libdvi/dvi_serialiser.c"
 
 PicoDVI::PicoDVI(uint16_t w, uint16_t h, vreg_voltage v, const struct dvi_timing &t, const struct dvi_serialiser_cfg &c) {
   framebuf_width = w;
@@ -20,8 +15,36 @@ PicoDVI::~PicoDVI(void) {
   if (framebuf) free(framebuf);
 }
 
+static struct dvi_inst *dviptr = NULL;
+static uint16_t *fb = NULL;
+static uint16_t fbw = 0, fbh = 0;
+
+static volatile bool foo = true;
+
+//void core1_main() {
+void setup1() {
+    while(foo); // Wait for begin() to do its thing
+
+    dvi_register_irqs_this_core(dviptr, DMA_IRQ_0);
+    dvi_start(dviptr);
+    dvi_scanbuf_main_16bpp(dviptr);
+    __builtin_unreachable();
+}
+
+void core1_scanline_callback() {
+    // Discard any scanline pointers passed back
+    uint16_t *bufptr;
+    while (queue_try_remove_u32(&dviptr->q_colour_free, &bufptr));
+    // Note first two scanlines are pushed before DVI start
+    static uint scanline = 2;
+    bufptr = &fb[fbw * scanline];
+    queue_add_blocking_u32(&dviptr->q_colour_valid, &bufptr);
+    scanline = (scanline + 1) % fbh;
+}
+
+
 bool PicoDVI::begin(void) {
-  if ((framebuf = (uint16_t *)malloc(framebuf_width * framebuf_height * sizeof(uint16_t)))) {
+  if ((framebuf = (uint16_t *)calloc(framebuf_width * framebuf_height, sizeof(uint16_t)))) {
     vreg_set_voltage(voltage);
     sleep_ms(10);
 #ifdef RUN_FROM_CRYSTAL
@@ -32,35 +55,31 @@ bool PicoDVI::begin(void) {
 #endif
 
     dvi0.timing = timing;
-    //dvi0.ser_cfg = DVI_DEFAULT_SERIAL_CONFIG;
     memcpy(&dvi0.ser_cfg, cfg, sizeof dvi0.ser_cfg);
-#if 0
     dvi0.scanline_callback = core1_scanline_callback;
-#endif
     dvi_init(&dvi0, next_striped_spin_lock_num(), next_striped_spin_lock_num());
 
+    uint16_t *bufptr = framebuf;
+    queue_add_blocking_u32(&dvi0.q_colour_valid, &bufptr);
+    bufptr += framebuf_width;
+    queue_add_blocking_u32(&dvi0.q_colour_valid, &bufptr);
+
+#if 0
+// This first line is where things go south
+    *dviptr = dvi0;
+    fb = framebuf;
+    fbw = framebuf_width;
+    fbh = framebuf_height;
+//    multicore_launch_core1(core1_main);
+foo = false; // Set core 1 free
+#endif
+
+    for (int i=10; i<20; i++) {
+        framebuf[i * framebuf_width + i] = 0xF800;
+    }
+
     return true;
   }
   return false;
 }
 
-#if 0
-void core1_main() {
-        dvi_register_irqs_this_core(&dvi0, DMA_IRQ_0);
-        dvi_start(&dvi0);
-        dvi_scanbuf_main_16bpp(&dvi0);
-        __builtin_unreachable();
-}
-
-void core1_scanline_callback() {
-        // Discard any scanline pointers passed back
-        uint16_t *bufptr;
-        while (queue_try_remove_u32(&dvi0.q_colour_free, &bufptr))
-                ;
-        // // Note first two scanlines are pushed before DVI start
-        static uint scanline = 2;
-        bufptr = &framebuf[FRAME_WIDTH * scanline];
-        queue_add_blocking_u32(&dvi0.q_colour_valid, &bufptr);
-        scanline = (scanline + 1) % FRAME_HEIGHT;
-}
-#endif

src/PicoDVI.h

@@ -2,7 +2,7 @@
 
 #include "pico/stdlib.h"   // In Pico SDK
 #include "hardware/vreg.h" // In Pico SDK
-#include "../software/libdvi/dvi.h"
+#include "dvi.h"
 #include "../software/include/common_dvi_pin_configs.h"
 
 class PicoDVI {

src/dvi.c

@@ -0,0 +1 @@
+../software/libdvi/dvi.c

src/dvi.h

@@ -0,0 +1 @@
+../software/libdvi/dvi.h

src/dvi_config_defs.h

@@ -0,0 +1 @@
+../software/libdvi/dvi_config_defs.h

src/dvi_serialiser.c

@@ -0,0 +1 @@
+../software/libdvi/dvi_serialiser.c

src/dvi_serialiser.h

@@ -0,0 +1 @@
+../software/libdvi/dvi_serialiser.h

src/dvi_serialiser.pio.h

@@ -1,8 +1,3 @@
-// This is a special instance of dvi_serialiser.pio.h - created by first
-// doing the normal PicoDVI build via cmake, then moving the this one file
-// here (alongside Arduino lib header) and changing path for the
-// dvi_config_defs.h include line.
-
 // -------------------------------------------------- //
 // This file is autogenerated by pioasm; do not edit! //
 // -------------------------------------------------- //
@@ -80,7 +75,7 @@ static inline pio_sm_config dvi_serialiser_debug_program_get_default_config(uint
     return c;
 }
 
-#include "../software/libdvi/dvi_config_defs.h"
+#include "dvi_config_defs.h"
 static inline void dvi_serialiser_program_init(PIO pio, uint sm, uint offset, uint data_pins, bool debug) {
     pio_sm_set_pins_with_mask(pio, sm, 2u << data_pins, 3u << data_pins);
     pio_sm_set_pindirs_with_mask(pio, sm, ~0u, 3u << data_pins);

src/dvi_timing.c

@@ -0,0 +1 @@
+../software/libdvi/dvi_timing.c

src/dvi_timing.h

@@ -0,0 +1 @@
+../software/libdvi/dvi_timing.h

src/tmds_encode.S

@@ -0,0 +1 @@
+../software/libdvi/tmds_encode.S

src/tmds_encode.c

@@ -0,0 +1 @@
+../software/libdvi/tmds_encode.c

src/tmds_encode.h

@@ -0,0 +1 @@
+../software/libdvi/tmds_encode.h

src/tmds_table.h

@@ -0,0 +1 @@
+../software/libdvi/tmds_table.h

src/tmds_table_fullres.h

@@ -0,0 +1 @@
+../software/libdvi/tmds_table_fullres.h

src/util_queue_u32_inline.h

@@ -0,0 +1 @@
+../software/libdvi/util_queue_u32_inline.h